Bitter Morning Chill—But Brighter, Milder Days Ahead

Thunder Bay starts March with a frigid -20°C and wind chills near -30°C. Sunshine dominates today, but a big warm-up is coming, with highs near +3°C by Monday!

Thunder Bay is starting the first day of March on an icy note, with a current temperature of -20°C. A northwest wind at 17 km/h is making it feel like a frigid -30°C. The humidity sits at 69%, and the barometric pressure is at 102.3 kPa and rising, signaling stable conditions. Visibility is excellent at 24 km, but don’t let the clear skies fool you—this kind of cold means frostbite can set in within minutes. If you’re stepping out early, bundle up!

Today’s Forecast: Sunshine, but Still Frigid

Thunder Bay will see plenty of sunshine today, but temperatures will remain cold. Winds from the northwest at 20 km/h will ease up early this morning, but not before keeping wind chills brutally low at -28°C. The afternoon high will climb to -7°C, with the wind chill making it feel closer to -12°C. The UV index is low at 2, but with the snow reflecting the bright sun, sunglasses are a good idea.

Tonight: A Clear but Bitterly Cold Night

Skies will remain clear this evening, and winds will stay light at up to 15 km/h. The low will drop to -21°C, and with wind chill values plunging to -28°C overnight, frostbite remains a concern. If you’re heading out, dress in layers—this kind of cold bites fast!

Sunday: Milder, But a Frosty Start

Sunday morning will begin with a harsh wind chill of -28°C, but things improve as the day progresses. Skies will cloud over early in the morning, and winds will stay light at up to 15 km/h. Temperatures will climb to -2°C by the afternoon, with the wind chill easing to -4°C—practically tropical compared to today!

Sunday night will bring cloudy periods and a low of -9°C.

Looking Ahead: A Much-Needed Warm-Up!

• Monday, March 3 – A mix of sun and clouds with a high of +3°C—a huge jump from today’s frigid air! The night remains cloudy with a 30% chance of flurries and a low of -4°C.
• Tuesday, March 4 – Cloudy with a 40% chance of snow and a high of +2°C. The night stays cloudy with a 30% chance of flurries and a low of -6°C.

What to Wear?

For today and tonight, heavy-duty winter gear is a must—thick coats, insulated gloves, scarves, and a warm hat will help keep frostbite at bay. By Sunday afternoon, with temperatures nearing -2°C, you might be able to lose a layer. By Monday, with temperatures above freezing, a lighter winter jacket may finally be enough!

Thunder Bay Weather Trivia

Did you know? The coldest March 1 ever recorded in Thunder Bay was a bone-chilling -38.3°C in 1962! Meanwhile, the warmest March 1 on record was 7.5°C in 2000. While today is certainly cold, it’s far from the worst this region has seen!